Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b34493126e37918…

MALICIOUS

PDF

76.4 KB Created: 2021-04-30 19:34:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 983e7f06eb0bd86b859b437a7249c0da SHA-1: 2868eae44a5a739ad54eeac1049b9e3218134479 SHA-256: 3b34493126e37918774b7412e109f545f9058425710dd3383c3c853863966650
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to host or redirect to a malicious payload. The presence of a 'download button' heuristic further supports the phishing lure attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://xajibur.ru/strik?utm_term=how+can+i+learn+organic+chemistry+easily PDF link annotation
    • http://bidetoluji.getenjoyment.net/47153789782.pdfIn PDF document text
    • https://cdn.sqhk.co/bimolixumotu/hCihOrI/fort_battle_royale_squad_fire_nightclub.pdfIn PDF document text
    • https://cdn.sqhk.co/lelogivotosu/jcHJmlu/pijadurelaxoposevoro.pdfIn PDF document text
    • https://nikigetevakawu.weebly.com/uploads/1/3/1/4/131413362/bofefezalogop.pdfIn PDF document text
    • https://pimalikatirowo.weebly.com/uploads/1/3/4/0/134040386/781060.pdfIn PDF document text
    • https://cdn.sqhk.co/sesijisova/64ie4ah/88337839547.pdfIn PDF document text
    • https://cdn.sqhk.co/gulanuwe/lhijdha/the_jackbox_party_pack_3_free_mac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8a295dc-4f8a-4342-a999-574e1eef9b0a/manual_de_urbanidad_de_carreo_resumen_por_capitulos.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/825181735.pdfIn PDF document text
    • http://muwuvago.atwebpages.com/hallelujah_our_god_reigns_guitar_chords.pdfIn PDF document text
    • http://duvodix.myartsonline.com/bostitch_floor_nailer_model_m111_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/86726962320.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/50065873224.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d54eabe7-4b1b-460e-af41-bbb18c9a28a4/is_little_fires_everywhere_the_first_book.pdfIn PDF document text
    • http://xukokumo.myartsonline.com/10913744362.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ce1bfcb-f170-45ac-aecc-fbe265c8ce2e/how_to_do_a_regression_on_spss.pdfIn PDF document text
    • http://bilisedutave.myartsonline.com/the_kingdom_of_god_is_within_you_tolstoy.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/cbspd_study_guide.pdfIn PDF document text
    • http://jibimom.myartsonline.com/lewevurinurewelum.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED62 5368 bytes
SHA-256: ebe773ef237648a2e6227fb0c169f79ea60d8547a83e405b1a7612c8cf315ab1
font_01_sfnt_off0000ff8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8A 10716 bytes
SHA-256: f4b08f0685614d16ece1214945bbebbbb43fb42faa057a0aeee30b7b75f06e40

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